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(4) Evapotranspiration—Estimated mean, minimum,and maximum evaporation,with the months of
<br /> occurrence of maximum and minimum evaporation,for the Unit.
<br /> (5) Runoff Volume/Pattern—Projected volume and pattern of runoff for the Unit including peak stream
<br /> discharges associated with the storm conditions specified as design criteria for the particular class of Unit,as
<br /> prescribed in Table 4.1 of Article 4, Subchapter 2,Chapter 3,Subdivision I of this division.
<br /> (6) Wind Rose—An estimated wind rose for the Unit showing wind direction,velocity,and percentage of time
<br /> for the indicated direction.
<br /> (f) Geology.
<br /> (1) Map and Cross-Sections—A comprehensive geologic map and geologic cross sections of the Unit
<br /> showing lithology and structural features.Cross sections shall be indexed to the geologic map and shall be located to
<br /> best portray geologic features relevant to discharge operations.
<br /> (2) Materials—A description of natural geologic materials in and underlying the location of both the Unit and
<br /> its surroundings, including identification of each rock's type,relative age,distribution and dimension features,
<br /> physical characteristics, special physical or chemical features(e.g.,alteration other than weathering),distribution,the
<br /> extent of any weathered zones,susceptibility to natural surface/near-surface processes,and all other pertinent
<br /> lithologic data,all in accordance with current industry-wide practice[e.g., California Division of Mines and
<br /> Geology's(CDMGs)Note 44 "Guidelines for Preparing Engineering Geologic Reports"(April, 1986)].
<br /> (3) Geologic Structure—A description of the natural geologic structure of materials underlying the location of
<br /> the Unit and its surroundings,including: the attitude of bedding(if any);thickness of beds(if any);the location,
<br /> attitude, and condition(tight,open,clay-or gypsum-filled,etc.)of any fractures;the nature,type(anticlinal,
<br /> synclinal,etc.)and orientation of any folds;the location(surface and subsurface), age,type of surface displacement,
<br /> attitude,and nature[e.g., aperture, amount ofbrecciation, degree ofalteration and type of alteration products
<br /> (tight,gouge-filled, etc.)] of any faults; and all other pertinent,related structural data,(all of the foregoing)in
<br /> accordance with current industry-wide practices[e.g., CDMG's Note 42 "Guidelines to Geologic/Seismic Reports"
<br /> (May, 1986), and CDMG Note 49 "Guidelines for Evaluating the Hazard of Surface Fault Rupture"(May, 1986)].
<br /> (4) Engineering and Chemical Properties—The results of a testing and estimation program,carried out by a
<br /> registered civil engineer or certified engineering geologist,as needed to formulate and support detailed site design
<br /> criteria, including:
<br /> (A) detemnnation of engineering and chemical properties of geologic materials underlying and surrounding the
<br /> Unit,and of the Unit's containment structure components(i.e.,liner,LCRS, and final cover components);
<br /> (B) determination, or estimation,of the engineering and chemical properties of the waste and other layers
<br /> placed,or to be placed,within the Unit.
<br /> (5) Stability Analysis—A stability analysis,including a determination of the expected peak ground
<br /> acceleration at the Unit associated with the maximum credible earthquake(for Class II waste management units)or
<br /> the maximum probable earthquake(for Class III landfills).This stability analysis shall be included as part of the
<br /> ROWD(or JTD) for the proposed Unit, and an updated stability analysis(if the original analysis no longer reflects
<br /> the conditions at the Unit)shall be included as part of the final closure and post-closure maintenance plan. The
<br /> methodology used in the stability analysis shall consider regional and local seismic conditions and faulting.Data and
<br /> procedures shall be consistent with current practice and shall be based on an identified procedure or publication.The
<br /> stability analyses shall include modifications to allow for site specific surface and subsurface conditions.The peak
<br /> ground acceleration so determined shall be the stability and factors of safety for all embankments, cut slopes, and
<br /> associated landfills during the design life of the unit. For landfills and for waste piles and surface impoundments
<br /> closed as landfills, final cover slopes shall be designed in compliance with the slope requirements of 421090.
<br /> (A) The stability analysis shall ensure the integrity of the Unit, including its foundation, final slopes,and
<br /> containment systems under both static and dynamic conditions throughout the Unit's life, closure period, and post-
<br /> closure maintenance period.The stability analysis shall include:
<br /> 1.the method used to calculate the factors of safety(e.g.,Bishop's modified method of slices,Fellinius circle
<br /> method,etc.);
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